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Lpi 101-500 (LPIC-1 Exam 101, Part 1 of 2, version 5.0) Certification Exam is the first of two exams required to earn the LPIC-1 (Linux Professional Institute Certification Level 1) certification. LPIC-1 Exam 101, Part 1 of 2, version 5.0 certification is designed for entry-level Linux professionals who have a basic understanding of Linux and its command-line interface. The LPIC-1 certification validates the skills needed to perform maintenance tasks on the command line, install and configure a computer running Linux, and configure basic networking.
Lpi LPIC-1 Exam 101, Part 1 of 2, version 5.0 Sample Questions (Q490-Q495):
NEW QUESTION # 490
After running the command umount /mnt, the following error message is displayed:
umount: /mnt: device is busy.
What is a common reason for this message?
- A. A user has a file open in the /mnt directory.
- B. Another file system still contains a symlink to a file inside /mnt.
- C. The files in /mnt have been scanned and added to the locate database.
- D. The kernel has not finished flushing disk writes to themounted device.
- E. The kernel thinks that a process is about to open a file in /mnt for reading.
Answer: A
Explanation:
Explanation
One of the common reasons for the error message "device is busy" when trying to unmount a file system is that a user or a process has a file open in the mounted directory. This prevents the kernel from releasing the file system resources and detaching the device. To find out which user or process is holding the file system, one can use the lsof or fuser commands12. For example, lsof /mnt or fuser -m /mnt will list the processes that have open files in /mnt. To force the unmounting of a busy file system, one can use the -l option of the umount command, which will perform a lazy unmount. This means that the file system will be detached as soon as it is not busy anymore3. References: 1: How to solve "device is busy" problem in Linux 2: How to Find Out Which Process Is Using a File in Linux 3: umount(8) - Linux man page
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NEW QUESTION # 491
Which grep command will print only the lines that do not end with a / in the file foo?
- A. grep -v '/#' foo
- B. grep'/$' foo
- C. grep -v '/$' foo
- D. grep '/#' foo
Answer: C
Explanation:
Explanation
Thegrepcommandthatwillprintonlythelinesthatdonotendwitha/inthefilefooisgrepv/' foo. This command uses the following options and pattern:
-v: Inverts the matching, meaning that it only outputs the lines that do not match the pattern.
/:Matchesa/characterattheendofaline.The symbol represents the end of a line in regular expressions. foo: The name of the file to search.
The output of this command will show all the lines in the file foo that do not have a / as the last character. For example, if the file foo contains the following lines:
/home/user/ /var/log/messages /etc/passwd /usr/bin/
The output of the command will be:
/var/log/messages /etc/passwd
The other commands are incorrect for the following reasons:
* grep '/$' foo: This command will print only the lines that do end with a / in the file foo, which is the opposite of what is required.
* grep '/#' foo: This command will print only the lines that contain the string /# in the file foo, which is not related to the question.
* grep -v '/#' foo: This command will print only the lines that do not contain the string /# in the file foo, which is also not related to the question.
References:
* [LPI Exam 101 Detailed Objectives], Topic 103: GNU and Unix Commands, Objective 103.7: Perform basic file management, Weight: 4, Key Knowledge Areas: Use ofegrepto search for extended regular expressions in text output.
* [How to Use the grep Command on Linux], Topic: Start and End of Lines.
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NEW QUESTION # 492
Which of the following commands displays the contents of a gzip compressed tar archive?
- A. gzip -d archive.tgz | tar tvf -
- B. gzip archive.tgz | tar xvf -
- C. tar cf archive.tgz
- D. tar -fzt archive.tgz
- E. tar ztf archive.tgz
Answer: E
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NEW QUESTION # 493
What command changes the priority of the process running with process id of 12345 to the highest priority?
- A. /usr/bin/renice -20 12345
- B. /bin/setpriority -20 12345
- C. /bin/setpriority +20 12345
- D. /usr/bin/renice +20 1234
Answer: A
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NEW QUESTION # 494
Which of the following commands can be used to display the inode number of a given file? (Choose two.) inode
- A. ln
- B. cp
- C. ls
- D.
- E. stat
Answer: B,D
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NEW QUESTION # 495
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